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  • Treatment Results icon

    Jawline Results
    1-2 Weeks | 4-6 Months

  • Treatment Procedure Time icon

    Procedure Time
    15-20 mins

  • Treatment Risk and Complications icon

    Risk & Complications
    Allergic Reactions, Bruises,
    Swelling, Eyebrow/eyelid dropping

  • Full recovery from treatment icon

    Full Recovery
    No Downtime

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    Back To Work

What is Masseter Botox Treatment?

The Masseter botox treatment addresses aesthetic concerns like a square jawline, facial asymmetry and medical issues such as TMJ disorders and bruxism. This is also known as jawline slimming botox as the masseter muscle is reduced in size as well as action.

Botox in the masseter muscle benefits facial structure by reshaping the transition from temples to jawlines and neck, enhancing the overall facial contour.

Where is the masseter muscle?

The masseter muscle, situated in the jaw region, is a critical facial muscle essential for chewing. Known for its feathered pattern, it stands out as the strongest muscle in the human body in terms of size ratio, capable of exerting forces up to 250 pounds of pressure on the molars.

Masseter botox

Jaw Botox For Face Slimming, TMJ, Bruxism, Facial Asymmetry

Cosmedocs stands at the forefront of advancing Masseter Botox treatments, specialising in remedies for jaw clenching, face slimming, TMJ disorders, facial asymmetry and pain.

Our extensive experience in conducting thousands of procedures is enriched by our educational arm, the Harley Street Institute, where we thoroughly research and teach our specialized techniques.

Masseter Hypertrophy?

Masseter hypertrophy can lead to a pronounced, square jawline and facial asymmetry, affecting one’s appearance and self-confidence. This condition often prompts individuals to seek treatments to achieve a more balanced facial contour.

What is Hypertrophy?

Masseter hypertrophy involves the enlargement of the masseter muscle, often caused by excessive chewing or bruxism. This can lead to a more pronounced jawline and potential discomfort due to increased muscle tension.

Jawline Slimming Botox and dual benefits

Jawline Slimming Botox goes beyond merely enhancing facial aesthetics by slimming the jawline; it serves as a testament to the effectiveness of reducing both the power and size of the masseter muscle. This reduction in muscle tension and volume not only contributes to a more contoured jawline but also facilitates overall face slimming.

The dual benefits of decreased muscle strength and diminished size underscore the multifaceted impact of this treatment, offering individuals a non-surgical solution to achieve a more harmonious facial silhouette while simultaneously alleviating symptoms related to muscle overactivity.

Benefits of Masseter Muscle(s) Botox

Masseter muscle has the following impressive cosmetic as well as medical benefits for men and women:

Medical Concerns:
 Teeth grinding (severe bruxism)
 Reducing jaw pain & tension
 Headaches & facial pain
 TMJ symptoms
 Muscle tension dysphonia
 Dental damage

Cosmetic Concerns:
 Facial asymmetry
 Jawline enlargement
 Aesthetic imbalance (Brachycephalic and dolichocephalic facies)

Jaw Botox Consultation & Procedure

Following your consultation and detailed facial evaluation at CosmeDocs, you proceed with the jaw muscle Botox procedure. The treatment is quick and relatively painless, thanks to the use of very fine needles known as “invisible needles.”

  1. The practitioner cleans and numbs the area before marking the injection sites if necessary. The dosage, customized for each patient and for each side, is based on the doctor’s assessment.
  2. You may experience a slight pinch or discomfort during the injection (typically 2-3 per side), but this feeling is usually short-lived. The treatment takes less than 60 seconds per side.
  3. After the treatment, we provide you with post-treatment instructions. Commonly, these include avoiding exercise for 24 hours, including steam rooms and saunas. Full written details are provided, along with a complimentary follow-up to assess the effect of the dose. Any necessary adjustments are complimentary.

Our assessment of your muscle size is based on the width of your face, the bulk of your muscle, as well as your fat and bone mass. Dosages are administered according to muscle size and facial contouring preferences.

Dose, Price & Results

We provide a standard treatment price covering the maximum dose needed for effectiveness. Low doses don’t work, and very high doses may cause side effects like jawline skin sagging. At CosmeDocs, our experience has led to a safe yet highly effective approach. Results appear from the second week to months 4-6, and with each subsequent treatment, the need for repeats may extend.

Masseter Botox Before and After Results

Masseter Botox before and after results showcase a significant reduction in the masseter muscle, leading to a more slender and defined jawline and lower facial contour. The extent of Botox injections, including their frequency and units, is determined by a thorough examination of the lower face and the size of the masseter muscle.

Client Reviews


  • Male £350
  • Female £350

Popular Treatments

Masseter Botox Before and After

Face Slim Botox for a Youthful, Sculpted Jawline

Whether men or women, a slimmer, sleeker jawline can make a huge difference. Face slim Botox gives ‘Facial Slimming Effect’ without the need of any crash dieting, heavy workouts and extreme weight loss. As your masseter muscle is relaxed, there is jaw reduction. Hence, your overall face shape looks leaner and youthful.

In Women: Many Asian women with unwanted squared jawline, greatly benefit from Face Slimming Botox and do not have to endure painful surgical experience to achieve a V-shape look.

In Men: Whereas in men, a jawline that is a bit too squarish for their facial features can throw out the facial balance, which is undesirable.

Masseter Treatment Video

Why Choose CosmeDocs?

Aesthetic doctors have vast experience in the field and have carried out thousands of Botox (botulinum toxin) and Dermal Filler procedures over the course of 12 years.

We tailor every treatment approach to achieve aesthetic goals for every patient. Since everyone is beautifully unique. By combining master injection skills, knowledge and our ‘Aesthetic Eye’ we help you to look the best version of yourself.

Time To Flaunt Your New Jawline 

Your new, lifted, sexy jawline is just a booking away. Schedule an appointment at CosmeDocs at your next opportunity.

Causes Of a Wide Face

Enlarged Jaw Masseter Muscle

Masseter muscle enlarges due to excess using chew gum, weightlifting and involuntary nighttime teeth grinding (bruxism). Some individuals also clench their teeth during the day causing jaw pain and migraines. The recommended treatment is, therefore, masseter Botox injection.

Enlarged Mandible Bone

This condition requires surgical correction. Nevertheless, masseter Botox (botulinum toxin injection) may still help even if the masseter muscle is not very large. Some ethnic groups have large mandible bones such as Orientals.

Adipose Tissue (Fat)

Excess adipose maybe the issue. This can dissolved using liposuction or small PDO Threads (not cogs) around the jawline and chin area.

Loose Sagging Skin

With ageing the face volume depletes and skin may sage. Advanced non-surgical skin or face lifting procedures utilise dermal fillers or PDO Threads

Frequently Asked Questions

How long does Botox masseter injections last?

Non-surgical jaw reduction and reshaping with Botox (botulinum toxin) is not permanent. The effects usually last between 3 to 4 months depending on the number of units injected during the procedure.
In general, large masseter muscles need three sessions the first year, two the second year, and then fewer for maintaining results.
Experts at CosmeDocs advise maintenance treatments two to three times a year, especially if it is difficult for you to manage facial pain and headaches due to teeth grinding.

Moreover, you must regularly schedule Botox injections 3 to 6 months apart if you want to keep the jaw-slimming effects by preventing your masseter muscle from returning to its original size.

How much does masseter Botox cost?

For jaw slimming and reshaping, masseter Botox cost UK is £350 per session for male as well as female patients. Moreover, the number of units of Botox injection is tailored for each patient since everyone is different.
Patients who desire more or persistent slimming effects may need to reschedule a follow-up treatment at CosmeDocs will ascertain your Botox face slimming cost. Doctors here will examine and assess the size of your masseter muscle to determine the number of sessions you require.

Am I the right candidate for jaw reduction Botox?

It is the thickness of your masseter muscles or your chewing muscles that helps the injector to determine your eligibility for Masseter Botox. You could be an ideal candidate for this non-surgical procedure if upon biting down firmly or clenching your teeth, the muscle feels nearly rock-hard and visibly bulges out.

Many patients with masseter hypertrophy tend to have similar habits of either teeth grinding at night or too often and too much gum chewing. This persistent activity eventually leads to enlarged masseter muscle. Hence, giving a squarish jawline which is undesirable especially in women.

In such cases, jaw slimming Botox may be a great solution for such patients. Other patients who are most suitable for Botox in masseter are those who:

  • Desire a more balanced and harmonised facial profile
  • Want to reduce jaw pain and tension
  • Need to address their involuntary teeth grinding habit (severe bruxism)
  • Want to have a symmetrical jawline
  • Struggling with TMJ symptoms
  • Suffer from frequent spells of migraine and tension headaches

Is jaw Botox safe?

All the Botox treatments are generally safe, provided that you seek the professional services of a doctor or a cosmetic surgeon who is experienced and well-versed in relevant knowledge.

We ensure that the highest of the industry standards are met and that each patient leaves our clinic happy and satisfied.

However, there are certain side effects of the Botox treatment that you need to be aware of:

  • Slight pain or discomfort
  • Minor bruising, redness and swelling at the injection site
  • Some muscle weakness especially during chewing
  • Dizziness or headaches

You can minimise any discomfort, bruising at the injection site or swelling by gently applying ice pack to the treated areas. You can easily carry out your normal activities after your botulinum toxin injections.

The chances of side effects, such as a crooked smile or a lopsided smile, is less than 0.5%. Other side effects of Botox such as allergic reactions are very rare.

What if I do not like the results?

Jawline filler adds volume to enhance definition. Masseter Botox injections reduce the size of the jaw muscles in a square jaw for face slimming.

What is the aftercare for jawline botox?

Another reason to get jaw Botox from an experienced aesthetic practitioner or a cosmetic surgeon is the provision of aftercare guidelines to the patients. Experts at CosmeDocs advise you to follow the aftercare instructions for better results:

  • Avoid alcohol consumption for at least 3 days after the treatment
  • Do not indulge in any strenuous exercising or hot yoga following your procedure
  • Avoid rubbing or intense facial massages after the Masseter Botox London
  • Do not lie down immediately after your Botox injection to prevent the migration of the product in the nearby areas.
  • Try to remain upright for at least 4-6 hours after the medical treatment.
  • Avoid indulging into any facial after Botox.
  • Stay away from sunbeds after Botox treatment and use an SPF 30 or higher.

Do you offer permanent jawline fillers?

Masseter muscle Botox involves slimming the shape of the outer jawline using Botox, a muscle relaxing injection. Relaxing the jaw muscles causes part of them to shrink.

We creatively weaken certain parts of the jaw muscle sculpting it chemically to enhance your face shape desirably.

In addition to achieving aesthetic results, patients can also expect significant relief from jaw pain and shoulder aches from masseter Botox.

What is the difference between Jawline Botox and Jawline Fillers?

Jawline Botox (botulinum toxin) and Jawline Fillers are non-surgical injectable treatments that are aimed at enhancing your facial profile. The procedures are carried out by an experienced doctor at CosmeDocs after a thorough facial assessment of the patient.

Jaw Botox injection is meant to relax your overactive muscles that are involved in chewing (masseter hypertrophy). It helps to shrink the size of the jaw muscle also known as masseter muscle hypertrophy, in a matter of a few weeks without the need of any surgery.

Jaw Fillers, on the other hand, helps to restore the volume along the jawline where contour and definition has been lost due to age. Many young patients, too, prefer jawline fillers to soften a square appearance and get a non-invasive chiselled facelift in minutes.

Usually, men and women can benefit from both the aesthetic treatments at the same time if they desire to instantly improve their facial balance. However, a prior detailed consultation is crucial before signing up for Botox treatment and non surgical jaw enhancement.

Will I have problems speaking and chewing my food after jaw botox injections?

In a word, no. The non-surgical jaw reduction treatment partially relaxes your masseter muscles, causing them to be less active. As a result, your bulky chewing muscle shrinks (masseter muscle hypertrophy) in just a few weeks. However, after chewing, you may experience slight fatigue around the muscle area, but this is merely a momentary event that will subside, usually within a week.

To conclude, a masseter Botox injection will not affect your speech or eating activity in any way. On the other hand, your unbearable jaw pain is significantly relieved.

Does Jawline Botox Hurt?

Botox in masseter is not all painful for the most patients. The reason behind this is that at CosmeDocs, experts usually use a skin numbing agent before injecting Botox (botulinum toxin) to avoid any possible discomfort.

Moreover, we use very tiny needle during the procedure to minimise any painful experience.
Many patients report a mere pinch or prick during the Botox injections and feel slight soreness immediately after the procedure. Nevertheless, that sensation usually goes away on its own with or without icing the treated areas.

Why CosmeDocs?

CosmeDocs is a renowned name in the industry of cosmetics. Our clinics located in Harley Street (London), Derby, Nottingham, and Portsmouth are well equipped and modern practices. CosmeDocs are also well-known trainers to physicians from around the globe.

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